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- เผยแพร่เมื่อ 11 ม.ค. 2019
- Dave scores a HP R1500 G3 rack mount Uninterruptible Power Supply (UPS) from the dumpster.
Teardown time!
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While yes the batteries are hot swappable, it requires batteries to turn on. This is pretty much standard for APC units. It's easy to get nice server sized APC units for free with dead batteries because they don't turn on anymore, add a fresh set and they work perfectly. From what I can tell they by default disconnect the line input for safety, this means that the unit must be "on" to detect that line is available to switch to. So if the batteries are dead it won't turn on. It's a logical yet annoying standard, if something happens to the UPS to make it fail it results in complete isolation. Once the unit is on, as long as the line relay is held down it will power itself letting you swap batteries.
I have several older APC units. All running w/o batteries. They make nice power conditioners.
Not sure about Dave's unit though?
Dave should check the outputs (sockets) for voltage.
Agreed - all the online APCs I oversee need a minimum battery voltage before they will turn on. My home UPS (5kW) unit does the same. Just feed that HP UPS 36V from a power supply and it will turn on.
While I'm not familiar at all with the model from the video, I do repair a lot of APC Smart-UPS units. While it's true some very specific (older) models and the cheaper BackUPS units won't start without batteries, a SmartUPS unit should start without batteries if you hold down the power button. If it doesn't, this is usually an indication of a fault in the battery charging circuit (and is usually a quick repair). The circuit is easily damaged when the cells in the batteries start to develop internal shorts.
It's easy to assume that it just needs batteries since it will usually start up and run normally once they're replaced, but you're likely to notice diminished battery life and overheating since the unit will be stuck in one of it's full charge states and won't be able to float charge. Some of the large (8000va+) units will detect this in a self test, but all of the smaller ones I've worked on will not.
Liebert (Vertive) units are the same. Some of the models won't even charge the battery unless the unit is on, which you can't do unless there's a charge on the battery.
@@h0ll0wm9n I have one where once it is powered on it can run without batteries but it cannot be started without a good battery.
No UPS startup without battery voltage! connecting a broken battery won't help.
You would probably need 20-30V from the battery to even activate it, or it stays dead.
I have a UPS I got going, without new battery it was just plain nothing, or less.
yes 90% of UPS requires batteries to turn on after that you can swap them out no issue the logic circuitry works from the charger output so if it is off in the first place the logic circuitry will have no power to turn on thats why it shows no signs of life
The ones I've come across, if you can easily replace the batteries, it'll want them to switch on. The ones where you need to open panels or unplug everything to get to the battery usually don't care.
Mine does. Will give a low battery beep though. Ya have to hold the power down though for like 7 seconds
Hey Dave Jones AKA eevblog host big fan here keep up the good work but you missed a chance for a little humor there here goes how do you turn a CD drive into a floppy Drive you leave it loose in the case. And also yeah that's how you doing. Keep up the good work oh speaking of dumpster diving my most recent dumpster dive Salvage project walk up giving me my under the cabinet lights you know a certain TV that has a certain type of thing in a name AKA and LED TV it has been dropped screen broken also I eat your mashed using virtual power supply reverse engineered it enough so that I can get it to just be on or off manually and not shut down Judith any problems at with thanks. Be attached and not present ignoring shut down signals that for anything that's not connected or not in use. Ever done something like that. Also I'm studying to be an IT technician one question which I'm not familiar with is I've seen PC and computer power supplies that have power connections Mark fan power what is with that and also is it not filtered as well there's a controlled could have any other use or purpose in anything other than mine fans or perhaps be usable when repurposing. And anything that we need to watch out for if that were tried. I do not know the specs it's something I've got my cross bunch and having a hard time finding anything on. Any thoughts on any of this or any comments on the others will be appreciate it thanks to you and the electronics Community for all the help with everything from everyone. Keep up the good work love mailbag USA USA USA all the way because that's where I'm from go remember the batarisor.
Please don't complain. Misspelled it it's not something good would probably pick up. But I'm actually using a few of them in certain applications and yes there are Niche Niche applications for them for very low for all I use was it equipment that barely uses any current that's even to the berries or even low to load up on a remote control speaking of which if anyone has a load up with batteries that won't run anything else save put them in your remote controls so you don't have to always have fresh batteries and waste batteries are the remotes when if you're someone that doesn't mind changing them and often. It is economical especially since it's only Arabic news. What are the things I can't remember what I've used to me in right now but with let's just called battery life extenders they do work well believe it or not for what are good for Niche applications that is.
I've seen similar UPSs before act like this due to dead batteries, they need to be able to draw enough current from the batteries to start up, before they switch themselves to mains power. Try injecting power at the battery connector.
EDIT: Only inject power at the battery connector if the UPS is disconnected from mains! Otherwise you might release the magic smoke from your PSU.
👍
don't inject, disaster could happen.
Exactly! That and my bigger 2/3U APC ups make me hold the power button for a good time before they will start up after a complete power down. I only saw him pushing it.
Just put a big diode between your psu and ups, then your PSU should be fine.
one of the best parts of your channel is dumpster diving videos
I lite troubleshooting to!
Personally I'd like to see you troubleshoot this UPS, I think it'd be entirely interesting to see what steps you went through to figure it out. You could even go more in depth with your equipment usage to figure out what's wrong.
As my computer guru friend says, go through it's pockets for loose change, grab the interesting bits and recycle the rest.
That NTC MOV looks like it was *never* installed properly. Looks like the HP quality control person missed it. - 13:18
I'm wondering if the person who applies the silicone spotted it and left the schmoo off to have it reworked.
and then it was lunch time :D
Nope, it's just shitty lead-free solder that was forced onto the world for absolutely no reason, than to fail.
@@evilgremlin I believe it was introduced because people weren't disposing of electronics with leaded solder in them properly?
even though its hot-swappable.. a lot of UPS units will not turn on without a good battery initially. Once up and running the battery can be removed and changed. one of those weird quirks I've seen with UPS units of this type.
@Dave Micolichek
Correct. They ship with the batteries disconnected. They won't turn on without them to prevent people shoving them in, plugging in the servers, and forgetting the batteries.
mine just dies if I take the battery out while powered on, and everything goes off I lost unsaved stuff on my pc, I tried it once, I didn't think the whole thing would die.. I thought it would stay on, I was wrong.
8:05 You stated all the outputs are wired in parallel, you seemed to miss that there are 4 wires going to the output sockets, so 2 zones!
CambridgeMart Exactly! There’s one shared neutral (blue), but he missed the second hot (black) hiding under the neutral!
Dave, please try regenerating these lead acid batteries with a "Back EMF Charger", which is basically a Joule Thief circuit that pumps hundreds(?) of high voltage spikes per second into the battery, and is supposedly able to make them get most of their capacity back after several charge/discharge cycles. It would be really interesting if someone like you, who knows what they're doing, would test this theory in order to prove or disprove if it actually works. That is, you're sopposed to be able to get something like 4.5Ah back on a 5Ah battery, which wouldn't be that bad for "free" batteries (except of building the circuit).
that sounds like a housefire in the making. better do it outside
Actually, no. The batteries don't even get as warm as they get when charging them conventionally.
Yep, often you can shake them and literally hear chunks of dried electrolyte inside...
@Dave Micolichek No way to do that, those are Sealed Lead Acid batteries. So the electrolyte will be either a gel or in an absorbent glass mat.
@FnordOok And therefore, it won't dry out. But there could be oxyde buildup inside the cells (in German, we colloquially call it sulfur, but it's probably sulfuric oxyde or something like that), and this can supposedly be reduced back to sulfuric acid with these pulses. I don't know whether this is true, but that's the picture I got from what I've heard about it.
Try connecting a power supply to the battery cable. It shouldn't need more than a couple amps with nothing on the output.
I have a couple UPS units that refuse to do anything without a battery connected.
Great use for a 4 quadrant supply
It will try to start charging it... Will that be an issue?
@tin2001 The UPS can't try charge the power supply if it's not plugged into the mains. Not all of them will switch on from battery power though.
If that's the case, then as Don Reid mentioned, a 4 quadrant power supply would work great since it can act as a load as well as a power supply.
No, it's not "super duper black magic efficient" - It gets away with no active cooling since it's only running for 10-30 minutes, and while that all the heat gets dumped into those big aluminum blocks. It will not stand up to running continuously.
naw it is black magic, it's called ignore the problem and hope it goes away before it would be an issue.
@@digitalradiohacker Yes and it doesn't even matter if it gets real hot during the battery-load time. And yes, it does get hot inside if it is needed a full discharge to keep everything running max-time. Normally they run only a few seconds max. and normally not on full-load.
Besides that, they will normally start in a real cool environment (like 8-10 degrees celcius) in the server-room (Airco) so they can dump a lot of heat before reaching over 150 degrees.
A few full runs normally means replacing the batteries but these errors should not occur.
You'd generally program a server shutdown after a couple of % outage when you don't have an auto-starting-generator (yes, they are nice!) that starts in say a minute after power-outage.
In that case you have 2 short outages: 1 from the main power-problem, then it gets over to the generators, doing a little charge and then again when the main power gets back (and the generators go out). Since all non-essiental equipment is off it doesn't get a high load.
Very nice systems like that in chemical-factories and hospitals where we used to see them.
@Dave: I had 2 of these with the voltage regulators blown, replaced them and it works again. It is in normal use the hottest part...
Didn't expect this to be half as interesting as it was!! Nice.
I demand troubleshooting! Must need fixeded! Check the PPBUS G3HOT rail.
1. HP does not make/design their own UPS, Racks, or most of their Power/Racking equipment. It's all APC.
2. You have to hold the power button for 5 seconds to turn it on.
I think this is EATON, not APC (because: "smart slot" is more like eaton; I don't think that exists a 36V version of APC; markings of parts/transformers are not apc-like)
@@yanecisco I confirm this is definitely not APC manufactured UPS.
IBM, Dell, Fujitsu-Siemens and few others use APC as OEM, but HP always used some crappy cheaper UPS OEM manufacturer. Compared to this HP unit, APC made one looks like space ship.
Only quality stuff in here are CSB batteries (these in video are dead though).
This is an Eaton unit. There is even a reference in HPs documentation of the 1500 UPS.
I have two IBM badged units that are exactly the same. I went through the same head scratching before I discovered it requires batteries charged to at least 80% to get started. Once the UPS is running you can hot swap the batteries, but will not start with dead batteries.
After replacing the batteries, and charging them, one UPS is running happy as Larry.
Another note I've experienced with APC (Schneider) UPS's (I've worked with them over years):
They actually require a battery, or something that outputs some voltage on the battery terminals to actually turn on.
You can hack this by artifically supplying the required voltage to the UPS and it might start.
I've managed to get a flat battery pack to work again with a supposedly dead UPS, which worked fine after...
Dave is so spoiled by the dumpster room that he's gotten picky about what items to take and what to leave. :)
I used to work with these connected with a product at IBM, they went under the model name 2145 UPS-1U in that guise. My favourite job was unboxing all the new ones and connecting the battery for the first time, big spark!
I think EATON is the OEM for a lot of companies. The network card is for monitoring. You can also configure them to send out e-mails if there's a power interruption or brownout on the mains. I would check just to be sure that there's not a safety interlock that prevents it from powering up if the cover is missing or a button behind the battery.
You can never have too many power supplies laying around. :-)
One of these came in last week for repair. Turned out the fan died (customer decided to buy the fan himself).
And it does not turn on without the battery, can confirm.
It's a 'Line Interactive' UPS, it's not going to switch on the inverter while it has mains applied. A 'Full Online' UPS is different and keeps the inverter running continuously.
If there are no LED's at all, check the battery charger circuitry. Some UPS's won't start up if the charger is dead as it also powers the board.
My old company would let me get first dibs on furniture they were throwing out. Some very large table tops and shelves. Great for shop stuff! In fact my electronics bench is made from one of the tops.
Yaesu and Yuasa isn't the same.
And Yaesu is still not the same as Yeasu
They're only the same in the way Dave mispronounces them ;-)
The Yeshua one is the best.
When Dave dumpster dives people listen.
Wait. Somebody threw a UPS with lead acid batteries in it into the dumpster? What the hell? That's hazardous waste!
Yeah, people are idiots :) Lead acid batteries are quite a valuable scrap too!
Recycling in Australia is mostly a joke, though lead from batteries is easy.
It's quite possible that particular office dumpster gets sorted for recyclables later though - Electronics is always worth picking over.
Good! Gives Dave a chance to dive. Wont do that in sorted trash, all the gold are gone by then.
It happens a lot. Business managers often tell contractors and such to chuck them in the bin. Contractors don't want to spend extra time arguing or removing the lead acid batteries or whatever, so they just do it. Or if they leave it behind, the person who's desk it ends up under/on gets sick of it and chucks it.
@@Chrisamic there's not only in Australia that recycling industry is a joke, here, in France, it's even worst: i worked a month in a hazardous waste materials facility nearby Dijon (you know, the supposed world famous capital of mustard (even that is a joke, no one make it anymore in this city, the closest plant is about five miles away)).
Anyway, i was precisely dedicated to collect, sort and store chemical hazardous materials. And guess what i saw ?
Our collection box-pallets was'nt ADR-compliant (Accord for Dangerous good on Road) (neither always closed with a cap), some of truck drivers did'nt get ADR kit in the cab (despite they must have it), asbestos waste was store on a concrete slab outside (just few little fences, those like on jobsite when they dug for bury water pipes, was there for keep out employees), they had at least two semi-trailers loads of collected used batteries stored in metal barrels stacked on pallets, really "ready to go", and the both masterpieces: the hazardous waste materials warehouse was only covered by a single layer of thin steel sheets (while some of most dangerous matters, as mercury in used lamps, was store in (so it's really to much easy to get in and steal what you want)) and my favorite part, with car batteries store outside by hundreds in boxes, was about partially empty liquid chemicals jugs: according the french environment code, chipping various jugs with various products in the same container IS NOT a mix.
Oh, i forgot the last but not the least: when we sort the waste materials, we did it... only by reading labels. By example: chlorydric acid, it's marked "acid", so it's an acid, sort to "acid" waste box. But if it's sodium-hydroxide, which is exactly the same product, it's not marked "acid", so it's a base and it's sort to base waste box.
I'm still wonder "how it does not catch fire, or worse, explode ?"
I say a last thing, here, in France, it's really a head-side walking country: if the keeper of the waste disposal site is OK, you can get out with your "today catch" even if cops can see you with reclaimed materials (no matter (litteraly) if it's laptops, printers, monitors, TVs (most of them still work or just have a tiny trouble easy to fix), various cables as well powercord as Christmas lights. Nothing astonishing as my garage look like E-waste Ben home, the two-third of it content is reclaimed.
Hello Dave,
I think the problem is because you don't have any functional battery inside it.
You can hotswap when it's powered on, but i'm not sure you can start up first time without a proper battery.
It's like that on my APC UPS (and it's pretty similar product grade)
8:05 I thought you'd be able to see that Dave as you were right on top of it but there's one earth feeding all 4, one neutral feeding all 4 and 2 lives. One powering one pair of IEC and another pair powering the other pair.
A Teardown on random computer parts would be cool, like a floppy drive, CD drive... etc
It is dual load - there is a black wire hidden behind the blue one on the output sockets. It becomes visible as you pan the camera away.
The auto-transformer is to normalize the output voltage in case the line voltage goes below 190VAC or over 230VAC. That's why there are so many relays and not just two. In that mode the UPS doesn't use the batteries until the voltage drops below 170V or jumps over 250V. The stupid thing is that most UPSes keep the batteries at their max charge voltage and not the recommended standby voltage. For a 12V PB battery the voltages are usually respectively 14.4V and 13.7V. This evaporates the water from the acid gel and makes it much more conductive. The result is shorted cells and after a while dry batteries. Literally - all the moisture leaves the gel and the lead plates oxidize scrapping the battery.
I have one of these kicking around, since before you found this one lol, definitely odd form batteries, this should be fun.
Actually might be a bit older of a model.
It's most likely Eaton Powerware PW5115 RM UPS (judging by its front and back look). I have the same - a nice and reliable unit!
Put 36 volts from a power supply to the battery input. Bet she'll fire right up. Thats how my APC units are. At least one of those relays in there rely on battery voltage.
Also with my APC's you can turn them on without mains by holding the power button as long as you have good batteries. Im sure the HP unit runs the same.
I'm sure that's a rebranded APC unit, looking at the construction and battery labels.
I would start by testing those high current relays. Mechanical relays are always suspect after few years of use.
The expansion thingy is an interface unit probably Modbus RTU on one of the RJ45 sockets and possibly Modbus IP or maybe BACnet IP on the other one. Often used for interfacing the unit to a Building Management System or monitoring system
Yuasa does batteries. So I suspect each of those 3 make different portions of the UPS. A Yuasa battery is factory in my Yamaha.
Those Dell pcs would be considered as a good PC in my country. In fact adding 4 gbs of ram they would run fine for office applications
Those C521s were the exact model for my first desktop! 160Gig HDD, 2Gigs RAM and a DVD drive.
Hook batteries up, bump the "battery" voltage up to 32-ish volts with a power supply, see if it turns on.
Sooo many perfectly good UPSs are thrown away with bad batteries because they will NOT fire up with a flat battery, hot-swappable or not.
Can't beat sulphation m8. 😕😔
Good quality batteries of that size are in the $20-$40 CDN/AUD range so for a couple of hundred bucks you can get a nice rack mounted UPS and save well over $1,000 as anything rack mounted is double the price because only businesses have racks.
omg, exactly what i need for my retro lan party !! you can play all kinds of games with that
It does have dual load output if you look it has a common and 2 line wires to the IEC connectors . It has to have a battery to start up as others have said .I have 2 of the same UPS
Dumpster Dive + Teardown + partial Trouble Shooting = WIN!!!
I look forward to seeing the full, or perhaps "next installment" of the trouble shooting video for this UPS... 👍🏼
Love the diving too. Looks like usable chassis for a project though.
It may cost a fair bit in batteries to get a UPS of THAT size up and running again, but I can almost guarantee it would still be much cheaper than replacing the UPS itself.
Most of those rack mount units and even some normal ups's require a 5-15 second button press to turn on or off as they are usually running critical equipment. Most if not all require battery voltage to turn on as the logic should be run from battery. Try using any three 12v batteries over 4 ah with at least a 12v charge in each.
Be careful with the Dell power supplies. Many (if not all) of them have a non-standard pinout on the ATX connector.
I learned this the hard way - I connected a standard PSU to a Dell board, and the PSU blew up immediately. But I was even able to fix it, only the 5V standby regulator was broken.
yes please do the troubleshooting!
Good thing you didn't remove the *_"warranty void"_* label. - 9:39
Then they would think: how did he found out!?
I don't know about the land down under but in the UK you can still palm those dell's off for 150 bucks ish.
I had a rack module PSU my coworker/friend gave me from our server room. It had new batteries but couldn't charge them or operate. I suspect I could have repaired it...I just had no way of getting 480 3p into my house!
Thanks for another great dumpster dive Dave :)
I found an apc backup twice that size for free (along with a fancy computer desk and many computers), i think i sold it for a couple hundred dollars, it came along with a APC server rack power management strip with ethernet, i swapped out the massive 40A plug on the end and turned it into a a power strip/surge protector/power conditioner for my home setup.
Man, wish I could find a dumpster room like this one. I'd salvage everything.
"The CD drive is flapping arround in the breeze" - Wow ! There's got to be quite a strong breeze down in the dumpster room ^^
Question how can can you have a floppy Drive installed on a modern bus inside a system yes you can when is the drive to CH flapping around the blue Breeze. Doris I did not say floppy disk drive.
You did check the blade fuses right? Change the batteries, and close the case, maybe the case lock needs to be closed?
its either the battery or the board, if theres a power integration chip for the internal system power supply, replace it they always fail
That label at @6:36 is for an UPS sold in Brazil. It says "IMPORTER: Hewlett-Packard Brazil" . The top 3 "FABRICANTE" sections only detail the 3 possible manufacturers for the batteries shipped with the unit. On the bottom it mentions local battery disposal regulations. How on earth did it end up at your dumpster, is a mystery... That would be some serious shipping costs if the batteries were shipped with it.
Interesting the lack of forced air cooling and fins on the heatsinks, guessing by the time they overheat the battery would be exhausted anyway. Probably only has a few mins of runtime at full load to allow servers to gracefully shut down.
I'm surprised that people don't know this by now. If your UPS doesn't work, check the battery! Seriously, 99/100 whenever I've found a dead UPS, I put in new batteries and it came back to life.
Lots of these have a case switch. Try powering it up with the lid on.
I've never seen one of these fail. These usually get tossed when the batteries die and you get the $600 replacement offer. Or when these (92% eff.) get replaced with newer (95% eff.) stuff.
Hold down the power button Dave! A lot of these units need more than a quick press so mistakes don't happen.
Some units can be powered on without a battery, but you have to hold down the button for a few seconds.
For the LCD screens, if they are 4 x 3 form factor they make great picture displays, just add a Raspberry Pi Zero and you're all set. Modern displays are all 16 x 9 which is lousy for photos.
Can we get a video on the difference in VA and Watts and how those units came to be and in which instance which one is used?
As others have said, it probably requires a reasonable battery voltage to start up. Charge the battery and try again.
Nice!!! I love your dumpster
Change they put 3 addresses on the sticker so that they can make them in each of those 3 places. Its easy for listing stuff at UL Etc. If you want to change afterward its a whole hassle.
Yaesu is the company that makes portable transceivers. Yuasa is the company that makes batteries. "It's a bobby-dazzlah!"
On a APC style UPS you have to looooooooong press the On/Off button!
Interesting to see the innards. It's Yuasa for SLA batts, and Yaesu for radio transceivers btw Dave :o)
Yeah, HP have OEMed UPSes from various suppliers over the years, I think they're APCs these days my really OLD 3kVA unit I think is Eaton.
Connected equipment warranties are BS ;)
At 8:14 you can see that the output sockets actually have a black and a brown wire connected to them. So it looks like it is dual-zone.
Usual failure is batteries swell themselves into UPS, then set off B/O battery alarm. BOFH shows up with screwdriver, proceeds to use more and more force to pry batteries out. Sometimes I’ve had to pull it completely out of the rack and take off the top in order to remove old batteries. Would it kill HPE to give extra 1/2” on tray sides and top?
LOL BOFH!!!!
I had to take a server out once to remove the swelled UPS. The top steel panel in the UPS had pushed up behind the front panel of the server directly above it so it couldn't slide out. If I recall, they were replacing the entire UPS and servers and everything at that site, so we didn't need to pry the batteries out.
My own one at home did need a screwdriver though. And a few swears. Swears make them come out easier.
@ 02:44
I got one of those about 2 years ago on the cheap for about 10 € (with 6 6 V dead batteries). 😄😆😉
Got a similar UPS and that doesn't need batteries to start up. It starts and beeps if no batteries.
The Dell PCs, I'd grab the DVD-RWs if they are that. Some of those had weird ATX supplies that if you are lucky don't actually fit into the usual ATX power socket. The wires were different...
Your problem is likely going to be a bad electrolytic capacitor(s) in the primary side of the power supply. It likely worked until power was lost. Look at the small caps and measure ESR if you can; if not try heating a few at a time to 150c and plug in to see if it powers on. Good luck
I this HP is anything like the APC rack mount units it will require just enough voltage from the batteries to trip the input relays before switching to 240v, then it should run no problem without any batteries. Try charging the input dc capacitor up with a power supply and the unit will likely work no problems. Its great to see whats worth salvaging in these dumpster videos.
Yuasa are commonly found in higher grade ups's, and those CSB batteries are very common in smaller/consumer grade UPS units. Yaesu is the manufacture of ham and other transceivers. Confusing as the spelling is so close :) Inject 32V of DC ~3-5A current into the battery connector and it'll fire right up. Most if not all of these things need a battery to close the line relay. After a short battery test (which will weed out weak batteries), it will resume normal operations.
Yaesu is a marketing brand for radios manufactured by Icom
What they said. (about UPS units needing good batteries to power up)
As others have said, you need good batteries for it to start up. Once it is alive you can hot swap, but you can't start them without batteries.
However, does look like that part was never soldered!
Also scrap batteries can go for a good price these days. a Automotive scrap N70 battery goes for about $10 with out a ABN and more if you can supply one in most cases.
1:45 The S-ATA DVD drive is probably worth grabbing. Those dell heatsinks are fairly chunky too but overall they're obsolete pc's
This was a family program up until 8:56 lol
EEVporn
Stand by switch mode power supply for turn on. Possibly cap or IC duff preventing turn on. If bulk cap voltage present I'd check there.
RTFM : Press and ***hold*** the Power On/Standby button (1) until the UPS beeps".
You can lead a horse to water but you can't make him drink the Kool-Aid.
It must be pretty good to get all those parts for FREE!
"Free" -- I'm sure he's paying quite a lot to have a space in that building, the dumpster is just one of the benefits.
@@gigaherz_
Free as in he does not have to go out or online to get parts.
Its AU, look up their real estate prices.
And try to desolder them ... have fun! You need an oven to get enough heat on the connections to get everything out like the relais near the heatsink-blocks. The caps are pretty easy but are probably bone-dry after staying active all these years continuously.
@elvin a propane torch makes it quick and easy.
The batteries are YUASA. The Radio brand are YAESU.
The Windows XP Licenses might be useful for older industrial system maintenance.
Perhaps at the battery side it need to have a minimum voltage to start up the unit.
And the transformer with three wires, it is possible that the ground is the fourth 'wire' ? Same structure as with MOTs.
I need some UPSs ....... you have no idea how jelly i am that you found that XD
If it doesn't work with new batteries/power from a psu, check the circuit arround the small transformer near the 7805ct regulator. The switching ic is probably the 8pin dip near the transformer. I bet the ic input cap is dead, a typical problem for switching psu after 10+ years..
I actually running my UPS with 18650's Lithium-Ion batteries. They're actually not suitable for high current applications but I running my router, Ethernet Switches and my small PC which I use as an Debian VPN Tunnel
general, these UPS starts on battery, some other equipments has "hotstart", starts with no battery.
It's funny see Brazilian's battery in chinese equipment and Brasilian stickers.
And electrical engineers probably fein ignorance as if they can't smell shit, and nobody ever taught them about what happens shit when it's dumped into a public waste stream.
I love this channel, lots of sexy teardowns!